%0 Journal Article %T Neotropical monogenoidea. 25. Anacanthorus penilabiatus n. sp. (Dactylogyridae, Anacanthorinae) from Piaractus mesopotamicus (Osteichthyes, Serrasalmidae), cultivated in the State of S£¿o Paulo, Brazil %A Boeger %A Walter A. %A Husak %A Wanda S. %A Martins %A Mauricio L. %J Mem¨®rias do Instituto Oswaldo Cruz %D 1995 %I Instituto Oswaldo Cruz, Minist¨¦rio da Sa¨²de %R 10.1590/S0074-02761995000600008 %X anacanthorus penilabiatus n. sp. is described from the serrasalmid fish, piaractus mesopotamicus (holmberg, 1887), cultivated in the centro de aq¨¹icultura, universidade estadual paulista. the new species is characterized by having a relatively straight copulatory organ with a long "lip" on the distal margin and a median longitudinal flap, and a copulatory ligament. the large size of the infrapopulations of this species of parasite indicates that it should be considered a potential agent causing losses in aquaculture of the fish host. %K anacanthorus penilabiatus n. sp. %K piaractus mesopotamicus %K aquaculture. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0074-02761995000600008&lng=en&nrm=iso&tlng=en